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Base62 Encoding

Tool for encoding / decoding with the Base62 encoding system, using all alphanumeric characters (upper and lower case) forming a base 62.

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Base62 Encoding -

Tag(s) : Character Encoding

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Base62 Encoding

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Base-62 Decoder










Base-62 Encoder


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Answers to Questions (FAQ)

What is Base-62? (Definition)

The base62 is an encoding method with 62 characters (ie all alphanumeric characters: digits 0-9, upper case letters A-Z and lower case a-z) allowing the encoding of binary strings. The 62 symbols used in this base 62 are (in this order): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.

Example: Base62 is encoded KixpUr22

Example: Base62 is decoded 169958929504 or the binary data 00100111,10010010,01010111,01110100,01100000

How to encrypt using Base62 cipher?

The binary data string is converted to base 62 (by a classical change of arithmetic base), the indexes of the 62 symbols are:

0 0112233445566778899
10A11B12C13D14E15F16G17H18I19J
20K21L22M23N24O25P26Q27R28S29T
30U31V32W33X34Y35Z36a37b38c39d
40e41f42g43h44i45j46k47l48m49n
50o51p52q53r54s55t56u57v58w59x
60y61z

Example: The string dCode, encoded in ASCII (01100100,01000011,01101111,01100100,01100101) is equivalent to the decimal number $ 430628103269_{(10)} $, which can be converted to base 62 in $ {7, 36, 3, 5, 39, 26, 53}_{62} $ or the characters 7a35dQr.

How to decrypt Base62 cipher?

Take the base62 string and note the indexes of each character to obtain a base 62 number. Convert this number into binary or directly encode it in ASCII (or Unicode) to obtain the plain message.

Example: Decode R0Ow, R is 27, 0 is 0, O is 24 and w is 58 either the number $ {27,0,24,58}_{62} $ or in decimal $ 6436402_{(10)} $ or in binary $ 11000100011011000110010_{(2)} $ or b62 in ASCII code.

How to recognize a Base62 ciphertext? (Identification)

Base-62 encoded strings contain only alphanumeric characters: numbers, uppercase and lowercase letters.

Source code

dCode retains ownership of the online "Base62 Encoding" source code. Except explicit open source licence (indicated CC / Creative Commons / free), the "Base62 Encoding" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or the "Base62 Encoding" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and all data download, script, copy-paste, or API access for "Base62 Encoding" are not public, same for offline use on PC, tablet, iPhone or Android ! Remainder : dCode is free to use.

Need Help ?

Please, check our dCode Discord community for help requests!
NB: for encrypted messages, test our automatic cipher identifier!

Questions / Comments

Thanks to your feedback and relevant comments, dCode has developed the best 'Base62 Encoding' tool, so feel free to write! Thank you!


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